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2pcs 3.7v 4.2v 3a Li-ion Lithium Battery Charger Over Charge Discharge Overcurrent Protection Board Module - Inverters & Converters - AliExpress
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Amazon.com: ZJchao 3.7V 4.2V 3A Li-ion Lithium Battery Charger Programmable Module for Solar Panel Battery Over Charge Discharge Current Protection Board : Cell Phones & Accessories
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